Apparatus for welding a terminal clip to a wire



May 5, 1953 J. s. BURGE ET AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE l5 Sheets-Sheet 1 Original Filed July 29, 1946 May 5, 1953 J. 5. BURGE El AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE l3 Sheets-Sheet 2 Original Filed July 29, 1946 QQVQFQ I I \MH HNNQQU May 5, 1953 J. 5. BURGE El AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE l3 Sheets-Sheet 5 Original Filed July 29, 1946 INI 'ENTOR.

May 5, 1953 J. 5. BURGE n AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE Original Filed July 29, 1946 13 Sheets-Sheet 4 INVENTOR. In/was 5. BUQG FLOYD .1. 704157 y VV/LLARD C.5/mw

HILTON J; M KEE- WARREN M E1052 a M A TTORNEYS May 5, 1953 J. s. BURGE El AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE Original Filed July 29, 1946 13 Sheets-Sheet 5 wIUkDvvU May 5, 1953 J. 5. BURGE T AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE l5 Sheets-Sheet 6 Original Filed July 29, 1946 y 5, 1953 J. 5. BURGE ET AL 2,637,798

APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE Original Filed July 29, 1946 1s Sheets-Sheet 7 IN V EN TORS 10155 .5. 54/2 5 720m J. F0057 BY W/LLflED C. SHflW HILTON J MCKEE W42 BEN M E7052 A TTOENEYS May 5, 1953 J. s. BURGE m" AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE 13 Sheets-Sheet 8 Original Filed July 29, 1946 May 5, 1953 J. 5. BURGE ET AL APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE 13 Sheets-Sheet 9 Original Filed July 29, 1946 141 102MB Y y 1953 J. s. BURGE Er AL 2,637,798

APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE Original Filed July 29, 1946 13 Sheets-Sheet l0 INVENTOR. JANE: J- BUEGQ- FLOYD J. Fousf Wuuveo C SHAW HILTON J fif /fire Warez-1v l7. z/aee MQM ITTO /VE Y May 5, 1953 J. 5. BURGE El AL 2,637,798

APPARATUS FOR WELDING A TERMINAL CLIP TO A WIRE Original Filed July 29, 1946 15 Sheets-Sheet l2 W W -iiin May 5, 1953 J. S. BURGE El AL Original Filed July 29, 1946 13 Sheets-Sheet l3 E T! A L x: m Y

21 Pl *,swlz H 5W3 53v4x IN VEN TOR. JflMES 5. B02 65- y WILL/van 0.5Hnw/ Hun-0N J. 1W KEE- YVARBEN M 2/352 ATTORNEYS Patented May 5, 1953 James S, Burge, Floyd J. Faust,- Willard- G. Shaw, andi'Warren" M. Rider; Anderson, and Hilton J: McKee, Middletown, Ind., assignors totGenei-al Motors G'orporationQ- Detroit, Mich ..a.cl3l19ra:

tion oi iflelaware.

Or in l. annl cation. July 29, 1946.. Small??- ,686;96.4. now Ba ent 25963 6 at 13.;1952. Divided and this application-May 2.4, 1950, SerialNalfiSfiGZ This-application is a-div-ision of: our" copending application, Serial No; 6861964; filed July-.29; 1946; now U. S. Patent 2596,3536 granted May L3, 1952:

This invention relates to themanufacture. of electrical condensers and more-particularly. to. condenser havinga' foil winding enclosed in a metal can to which one foil is electrically con nected to a wire extendingfrom the-can and in-= sulated therefrom.

An object of the invention claimed in this can. plication is-to facilitate the welding oia tern-final clip to the wire which the machine forms and attaches-tothewire; To accomplish this object, thedisclosed embodiment of the invention pr c vides an intermittently operatingconveyorhav in workholders for-receiving-- the condensers, a punchpress foriormingaterminal clip and attaching it to a condenser wire-when the-condenserhas been conveyed to-the-clip-attaching station and an electric welding appar atus which I applies electrodes tothe clip -and-w-ire and causes a welding current to ass when the condenser has been conveyed to the clip-weldingstation. After the welding operation, thecompleted' condensers are ejected fromthe conveyor: The machine provides means for operatingthe conveyor; weld ing apparatus and ejector-in timed relation.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the-accompanyingdrawings, wherein a preferred embodiment o f the present invention is clearlyshown.

In the drawings:

Fig; 1 is a front perspective-view-efi the machine.

Fig. 1A is a fragmentary-perspective view of a portion of the machine conveyor andwor-k holders supporting condensers;

Fig. 1B, drawn to a larger scale than Fig 1A, is a fragmentaryperspective view show-inga condenserlead wire and terminal clip attached thereto.

Fig. 2 is a diagrammatic plan of: the machine.

Fig. 3 is amechanismdiagram-of the-machine.

Fig. 4 is a view in the direction of arrow t of Fig. 3.

Fig. 5 is a rear elevation of thetableandcon veyor.

Fig. 6 isa view of a mechanism in the direction of arrow ,6 .of; Fig. .:3.

Fig. 7- is asectionaiview-online 1 ..7 .ofFig. 3.

Fig. 8 is a sectional. view .on viine .-K.+8.;,of Fig. 6.

Fig. 19 1s va sectionaii-viewon line S c-Sci Fig. .6.

Fig. IO-is-a sectionalviewon line Iii-idof 2. Fig. 11 is arra mectatr iew: Ur 9f File. 121w. fi ismal V ew. ine ital? o F g. 10.

Fig. 13 is: asectional View on. line 13 13 of Fig. 3,.

Fig. 14. is. avian. t e. densit es at a rQW [A .of Fig. 133..

Fig. 1-5;. is a. sectiona wisw 91.1. line; 1- l5; 9.? Fig; 3; V

Fig. is is a View n hedi e icn. Qt: -5. of Fig. 15;

Fi .l-7r-is a se tional. view. .0 2. line. lie-ii 93 Fig. 4.

Fig. 17A is. a, sectional viewthe. li KIA-7111A of Fig-1'17.

Ri 18:15.13. sect cnal'. view: 1. ine. Fig. 3-.

Fi 19: isasectienel visit: l ne Fig. 2.

Fi 201s. a, sectiona on ine Fig. 2..

Fi s. gr and-ezanase tio al o ines elf-2.1 and z t-2'2. res ec .ovdy. iFie .9-

Ha 1- 523.. wiring. dia ram i leptrissltseetrols; ofithe welder.

Referring; toiFi ss... 1: ant-1.2. th machine cam: p isesv a. cabin t. A. which. supp r c m ever 3 carryinsncrkholdeizs-w..eachiqreachin a denser CT. A conveyor BB conveys the con;- densers iromamachine fi r asssmtl eeq ndsn so. that the operatqr mair ea h condensers; unQIkthfi it conv or- B as-s iewn denserspassri ht m terminaiwire of; the co dense v a io a i 2 y connected with t .e-ie ting1..ap11a1 v.a...gr.oi1ml$101.1. .Qtl-.n t rou h; the. ma which. the cannitheisp i ens r; i exceeded. in

which fail tonassthegapacity. test.v or. fail on ac+ count of short=circuitingor on account. .ofiaiIu-re to discharge-properly; Thesecondensers which pass the-test remain=onthe-conveyor which carries them $0- a. clip attach-ing station CS where-aterminalaclip is, attached to the condenser wire. The terminalrclipstare made-byte. die-operated' by a-punch-press P. The terznin-al clip TC (Fig. 13 i-i-icludes a-flat zportionw having a screw receiving holeb and-tangs e and d which the punch press bends respectively around the bare members.

3 portion of lead wire Z and the insulated portion thereof. Then the condensers pass to a welding station WS where the clip is weldedto the terminal wire by an electric welder W. Welder W welds the tang c to the bare portion of the lead wire Z. At the right end of the cabinet the condensers are ejected by ejectorN (Figs. 1-3).

Referring to Fig. 5, the sheet metal exterior of the cabinet as shown in Fig. 1 is supported by a frame comprising two horizontal channel bars i supported above the floor by legs TI and 12 and plates 73, E4, I6 and H by a table I which supports also the punch press P. As shown in Fig. 15, a channel supports angle bars 80 supporting a plate 8I which supportsrails 82 which support the work-holders w comprising a plate 83 slidable along the rails and carrying resilient, condenser retainers 84. The workholders w are attached t links of a conveyor chain 85 which as shown in Fig. 5, passes around a drive sprocket 86, a slack take-up sprocket 050/, upper idle sprockets 81, lower idle sprockets 98 and an end idle sprocket 89, all of these sprockets being supported by a channel bar I0. Referring to Fig. 10, sprocket 89 is supported by a shaft 90 journaled in bearings supported by the channels I0. To the shaft 90 there is attached a bevel gear 9I meshing with a bevel gear 92 connected with a shaft 93 supported by a bracket 94 attached to a bar I0. Shaft 93 is connected with a sprocket 95 connected by a chain 95 with a sprocket 97 attached to a shaft II'I. Chain 96 passes around an idle sprocket 99 supported by a bracket I00 supported by plate I3.

The cabinet G in the front of right end of cabinet A (Fig. 1) houses an electric motor, not shown, which is operatively connected in any suitable manner with a shaft IOI connected with a shaft IOIa journaled. in a bearingllllb supported by plate I4 (Fig. 9) and connected with a sprocket I02 (also Fig. 6). A chain I03 passes around sprocket I02 and sprockets I04 and I05 and is engaged by an idle sprocket I06 pivotally supported at IIJI by a lever I08 pivoted at I09 having a slot IIO through which passes a clamp screw III threaded into the plate I4. Lever I08 is adjusted to take up the slack in chain I03 and it is held in adjusted position by tightening the screw III which passes through a clamp washer Referring to Figs. 6 and 9, sprocket I94 is attached to the hub of a clutch driving member II5 of a one-third revolution clutch J having a driven member IIB keyed to theshaft I I'I,.journaled in bearings I I8 sup-ported by a bushing I I9 attached to plate I4. I Shaft II'I carries the conveyor drive sprocket 91 (Fig. 10). Shaft III is journaled in a bearing I carried by a bracket I2I supported by plate I4. The hub of the clutch driving member H5 is fitted with bearings I22 which are journaled on the shaft Ill.

-Referring to Fig. 6, clutch driving member H5 is connected with clutch driven member Il6 by lever I25 pivoted at I26 on member II6 and having a tooth 'I2'I for engaging a notch I28 ofthe driving member II5. When the lever, I25 is released for counterclockwise motion about its pivot I26, a spring I29, connecting lever I25 with member H9, causes the lever to connect the clutch Lever I25 is prevented from engaging its tooth I2'I with a notch I29 by a lever I30 pivoted at I3I upon the, plate I4 and urged counterclockwise by a spring I32 which surrounds a rod I33 and which is confined between the eye head I34Of the IOd. and a block I35 havinga screw I36 pivoted on lever' I30 and retained by a nut I31. The head I34 is pivoted at I38 on a lever I39 pivoted also on I3I. Lever I39 has a notch I40 for receiving a latch pawl I4I attached to a shaft I42 which retains the lever I39 in the position shown against the action of a spring I43 connecting said lever with the plate 14. The right end of rod I33 is threaded to receive a nut I44 which, as shown in Fig. 6, is spaced slightly from the right side of the block I35. Nut I44 is locked in adjusted position by a lock nut I45. Lever I30 has a hook I46 for engaging a notch I41 in member II6. Member IIfi supports a pivoted roller I48. To trip the clutch, the latch MI is retracted by clockwise rotation of shaft I42 and the spring I43 pulls the lever I39 clockwise. Rod I33 moves left carrying with it the nut I44 which pulls on the block I35 and causes the lever I30 to move clockwise to pull the hook I49 out of the notch I41 and thereby allowing the lever I25 to move counterclockwise by the action of spring I29., The clutch members H5 and H6 are then connected and H5 will rotate counterclockwise. If there were but one set of parts numbered I30 through I46, the member I I6 would turn one revolution. Toward the end of this movement the roller I43 engages the lever I39 to move it counterclockwise against the action of spring I43 and to cause, through the action of the spring I32, the lever I30 to be forced counterclockwise against the periphery of member II6. Before the end of the one-revolution the pawl MI is permitted to return by spring to be described to a latching position wherein the lever I39 will be latched as shown in Fig. 6, after the roller I48 passes to the right of it. Therefore, at the end of one revolution, the lever hook I46 will snap into the notch I41 to retain the plate I I6 coincidentally with the retraction of the lever tooth I27 from a notch I28 of driving member II5. In order to obtain a partial revolution of the clutch before it is automatically thrown out, for example, one-third revolution, three sets of members, numbered I30 through I45, are provided and the parts of these sets are similar to those described marked with the same reference numerals. The numerals applying to one set have a prime afiixed and the numerals applying to the other set have a double prime affixed. It will be seen that the locking levers I30, I30 and I30" are spaced equi-angularly about the driv-- ing member II5. If lever I39 is the first to be tripped, the clutch will rotate counterclockwise one-third revolution and roller I48 will pass under lever I39 to lift it so that it can be retained by lever I39 and will be caught by the latch MI and the clutch member IE6 will be stopped by the engagement with its notch I47 by the hook I46 of lever I30. For the next one-third revolution, the latch MI is retracted so as to allow the clutch members to be connected for another one-third revolution, during which the roll-,- er I48 ,will engage the lever I39 which willresult in the engagement by the member H9 with the hook I49 of lever I30". I

The three latches I4I, I4! and I4!" are connected by shafts I42, I42 and I42", respectively, which, as shown in Fig. 7, are attached tolevers I5I, I5I' and HM" connected by links I52, I52 and I52 with a plate I53 which, as shown in Fig. 9, is journaled on roller bearings, I 54supported by the bushing II9. Plate I53 is urged by a spring I55 counterclockwise so that the shafts I42, I42 and I42 are urged clockwisein Fig. 7 or counterclockwise in Fig. 6 so as tourge thejatchingcmisinto latchina-pos tiom Plate I53. is rotatedclockwise bva camliii .en ascablc witlna .roller 51 carried. by alever: 15.8.: pivoted. at I59 and connected with lever I53 by a link. I68. Cam l58 is drivenby a cam shaft I61; which, as shown in 8, is: journaled in a bearing I62 supported-icy plate and a bearing. iioilpnwlo by a. bracket I84 attached to plate 1 4:. Sprocket I05 which is journaled loosely onthew-shaft: 'IBI, is connected therewith through a: one-revolution clutch K of the same construction: as. the. clutch J except. that there; is only one-,setof parts like. those numbered 139. through [46,; Theypartsxof clutch K which are like those of clutch ,I are indicated. by the same. numerals but with :a triple primeaffixed. The, latch pawl I4I attached to shaft, I 42" is; controlled by; apedal 1 E5. Bi-g; 19.) pivoted at L86 connected by; a link; 1.61 "with a lever I68 pivoted at I59 connected by a link I withv a, lever II-I attached to a. Sh t-f1 I12 con nected with a lever I13 connected by-;a;li nk- I'M (Fig. 12;) with a lever I15 pivoted atv I76, andconnected by a link ITI with alever I73 (see alsoEi t- 7), connected with, shaft I42'. Therefore, by depressing the pedal I65, the clutch K will be continuously tripped and camshaft i 6I willcontinuously rotate. Each time, shaft I61 makes one revolution, clutch J is tripped but it automatically throws out at the end, of one-third revolution so that the, conveyor Will be driven intermittently while, the, cam shaft rotates continuously,- until pedal, I65 is released.

Figs.u19 and20 show .a bar 489 mounted :on the upper end of a shaft ABI which is supported in abearing 482 attached to. a cover plate. 483. and in abearing 624 provided by aplate485. Th b r 88i)v is held in a normal position by a spring 485 attached to the cover 433 and .to a, lever 48'! attached to the shaft iBI. Spring 486 urges lever 48'! against a lever 4-83 on shaft I72. When pedal IE5 is depressed, lever 488 on shaft I'I.2 moves down (Fig. 21) and allows lever 487 on shaft IIBI to move left (Fig. 21) or up, (Fig. 22), by the action of spring. 486 until the lever 48'! strikes shoulder'488a of lever 488. This causes the pedal I65' to beheld in depressed position so that the machine will operate until the operator at the left end of the machine moves the stopping lever 48!! attached to shaft 48]. So long as the pedal I65 is held down, the cam shaft I61 willturn one revolution and then stop; and while the cam shaft IBiI is at rest, the conveyor 13 moves the workholders -w -a distance equal to the spacing of the-:workholders.

Fig. 1.0, whichisa-sectionalview on line,=I12 -I 9 Of'Fig. 3, shows ejector N for ejecting thecompleted condensers from the conveyor workholder. Posts I88-supported by channels 10 support rails I8'I for a-slide I82 having a condenser can pusher I83. Bar I82 is operated'by a lever I85 urged clockwise (Fig; 10) by spring I86 and attached to a shaft I81 journaled on brackets I88 (Fig. 12) and carrying a lever I89 connected by link I98 with a lever I9I attached to a shaft I92 journaled in a bracket I93 (Figs. 11 and 12).. Lever I9I carries a roller I95 for engaging a cam I96 driven by shaft I6I. While the portion of cam I96 of greatest radius engages the roller I95, the pusher I83 is located at the left of the condenser CT then in the workholder w as indicated by dotdash lines. During rotation of cam I96, the pusher I83 moves right into the position shown in Fig. 10, to move the condenser from position CT in the workholder w to position CT clear of the=.wonkho1d r to-nonnitrthe ndensate eravi .e wor olden hishie rzi aa seot onalt ow on lin -z 3. oilss; a shows a am 20; mounted n shaft 16 and enea oah e with a; roller .0 carried by a. lever; 2:0 pivo ed .at. 20.32 na p1ateZ0'4-a ach d o a, plate .2055; supported by channels 13;. Plate, 204- ar csua. weldercontrol switch: .SWAX having a plunger .20]. spring 208" urges the lever 282 a ainst. plunger 20] to operate switch SWAX whentheicam 2,0 It, permits it.

Fig. 15 which is a sectional view on line..:I,,5--I.5 of: Fig, 3,,shows; a. camzlo for engaging. a .roller 2,.II carried by -a,.lev.er 2 x2 pivoted at, 243 upon aplatell 4'. supported by. the channels I0 andconnected by a; link 2.15 with -.a lever 2I6 pivotcdat 2I'I on a bracket 2I8 supported by a channel I0 and-urged clockwise, by a spring 21.3. Lever 2I6 ensaaoa'ble with;= thepmnger 211,101? a norm ly closed. switchcswa. If, at hetimecam. 2 Fi 113). allows, spring 298 tov close switch SWGX, switch SW'Ii'is closed, the welder W will operate, The evc l fiarriosiafe l r bar 22! f r-enga in a condenser in, the workholder w. If the, con.

, ens r s pr sent. t e switch SW3 will not be opened and the weld ng a paratu will operate. If the condenser is not present when its work holder is at the weldingvstation, theswitch SW3 willbe openedb bar 216 so, that the welder will not operate. Downward movementof lever 21,6 limited bystop screw. 2,25 carried by a post. 2,26 supported by .theplate 2 I4.

Fig. .18.,Which is a sectionalview on linerl 3 -.wI 8 of Fig. 3, ;shows a cam 238 driven, byqshaft I-6I engaging .a roller 23] carried by a-lever- 232 hivoted at .233.,in -a. braclretl-l34v carriedby a channel an ur ed. clo kwise F ebl. spri s .235 (Fig, 17). A link.23.6 connects-lever 232 with a ver 231 attached t a shaft. 238 iourna d in bearings, 23.9 and 240 supported by the channel 70. Shaft 238 operates a lever 241. Lever 2327 (Fig. 17;) is connected by a link 2.42 with a lever 2.43 attached to a shaft 284 connected with a lever .225, A ,spring243a tendsto pull the levers 24I and 245 toward each other. Cam 230 operates to move them apart. These'levers operate the ondenser lead wire locating device at the weldingstationWS (Figlx.

The ad locatin device comp s s a bar 2 attached to. therigh (Fle- 1. on fiyoliarail 82 b screws; 24? and; spa rs .48 nd supportin condenser lead snide rods: 24.9 w i h cause the condenser lead tobelooa e about in th position 0 (Fig, 17),. Each of the levers ,24,I,;2 l5, is connected link 259 with a pin 25I slidable along .a slot. 252 provided by bar 2.46. Each pin 25I carries a lever 253 having a;wide, wire-grim pingjaw .254. Springs 256a, connected,,1tespectively, with pins 255,011 links 259 and pins 256 on levers 253, urge said levers against rollers 25? pivotedonscrews 2.58 attached tobar .2 16. Levers 253 have inclined surfaces 236 and horizontal (normally) surfaces 2.6I and 26I,', all engageable with rollers 251. When. cam 23D pusheslever 232 right (Fig. 18) levers 253 are separated as shown in Fig. 17. When cam 230 allows lever 232 to move left by springs 235, said springs and also spring 243a cause levers MI, 245 and levers 253 to move up and together to cause their jaws to grip the wire lead at 0 to hold it in position for welding it to the clip at the welding station WS. As the condenser CT moves right in Fig. 17 to the welding station, its lead wire Z is directed into the space directly above bars 246 by the inclined surfaces 246a and 249a of bars 246 and 249 respectively. Thewire Z is therefore at a'level to be gripped by jaws 254 which place the wire in position 0. When the lead wire is in position the clip CT is in the position shown in Fig. 18 between the welding electrodes e represented diagrammatically in Fig. 23. At the proper time, the upper electrode descends to engage the tang c bent around the bare portion of lead wire I and to press the terminal clip CT against the lower electrode and welding current is caused to pass to cause the tang c to be welded to the bare portion of the lead Wire.

The welder W is purchased equipment and its construction and mode of operation is well known to those skilled in the art of welding. The following is a brief description of the control of the welder.

Fig. 23 shows a diagram of electrical circuits other than those for the testing apparatus. Switch SW10 connects a three-phase A. C. source with a motor Ml which drives the conveyor B and the cam shaft I61, a motor M2 which causes the welder head to engage the work and a cam 700 to close a switch SW l5, a motor M3 which operates conveyor BB (Fig. 1), a motor M4 for operating the punch press P, a Welding circuit transformer WT, a transformer T2 for operating signal lamps Ll, a transformer T3 for operating a relay CR! controlling contacts CRP of a thyratrol control including tubes I and II for the welder, and a transformer Tl. When switch SW16 is closed, a timer Til is caused to operate. After a five minute interval or whatever time is required for tubes I and II to become heated for operation, contacts TIIC close and lamp L2 burns and relay RI is energized. Contacts RIC then close. Whenever switch SWI5 is closed by the cam 700, relay CR! is energized and its contacts CRP close and a circuit connection is made with one end of the primary of transformer WT. Tubes I and II automatically control the circuit connection with the other end of the primary of transformer WT so that welding current is applied at the proper instant in the welding operation.

If switch SW3 is closed when switch SWAX closes (by operation of cam 200), relay R2 is energized to cause its contacts RZC to close and the welder clutch solenoid Si is energized to effect the tripping or closing of the one-cycle, automatically-releasing welder clutch. This clutch then connects the motor M4 with the mechanism which causes welding electrodes to engage the terminal clip and the wire to pressthem together while welding current passes in consequence of closing switch SW15 by cam 700 which is operated by said mechanism.

Switch SW17 connects 110 volts A. C. with the testing apparatus described in copending application, Serial No. 686,964.

The motors MI, M2, M3 and M4 are protected by manually-operated and by thermal-overloadrelease spring-opened switches SW! 1, SWIZ, SW 1 3 and SW 1 4, respectively.

8 While the-embodiment oi the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted.

What is claimed is as follows:

1. A machine for use in the manufacture of electric condensers having an insulated lead extending from an enclosing can, said machine comprising a conveyor having workholders, each retaining a condenser, an electric Welder, a solenoid for controlling operation of the electric welder at a welding station for welding to the condenser leads a terminal clip previously assembled with the lead, means for feeling a condenser in the workholder at the welding station, a current source, a circuit for effecting connection of the solenoid with the current source and including two switches in series, one being under control by the feeler and remaining closed if a condenser is present'in said workholder and a mechanism for causing operation of said feeler means and for causing the closing of the other switch to efiect a cycle of welder operation if a condenser is present and then for causing operation of the conveyor.

2. In a machine for making an electrical device having a lead wire extending from the device and a terminal clip attached to the lead wire, the combination of a conveyor having workholders each for receiving a device, a welder positioned at a welding station along said conveyor, means for indexing the conveyor to move the devices successively to said welding station, bars between which the lead wire passes as the device moves to the welding station said bars having camming surfaces which direct the wire into a'relatively narrow space between the bars, means for locating the wire when in said narrow space in a position such that its terminal clip will be located between electrodes of said welder, and mechanism for operating the conveyor indexing means and the lead wire locating means in timed relation.

JAMES S. BURGE. FLOYD J. FOUST. WILLARD C. SHAW. WARREN M. RIDER. HILTON J. McKEE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date v 1,361,652 Wetmore Dec. 7, 1920 1,622,792 Languepin Mar. 29, 1927 1,869,804 Eksergian Aug. 2, 1934 2,007,698 Tear July 9, 1935 2,078,694 Smith Apr. 27, 1937 2,338,002 Mero Dec. 28, 1943 2,345,965 Elliott Apr. 4, 1944 2,414,905 Seltzer Jan. 28, 1947 r 2,449,505 Pito Sept. 14, 1948 2,460,807 Chanowitz Feb. 8, 1949 5 2,477,859 Burge et al Aug. 2, 1949 

